3.5 Ton 13 SEER Goodman Air Conditioner with Horizontal 21" Cased Coil Review 2026

// Bottom Line

This ACiQ horizontal cased coil works best for budget-conscious homeowners and contractors replacing aging 3.5-ton systems where basic 13 SEER efficiency meets code requirements. It's a solid no-frills choice for moderate climates, not premium performance seekers.

Review

The ACiQ 3.5-ton horizontal cased coil occupies a straightforward market segment: affordable replacement cooling for contractors and homeowners who prioritize upfront cost over premium features. At 42,000 BTU capacity, this unit targets homes around 1,400-1,600 square feet that need basic air conditioning without bells and whistles. The horizontal A-coil design fits tight installation spaces common in older homes, and the compact 21-inch height makes it practical for attic placement where vertical headroom is limited.

This coil delivers 13 SEER1 efficiency using R410A refrigerant and a single-stage reciprocating compressor. The 75 dB noise output is typical for single-stage units, though noticeably louder than variable-capacity alternatives. Standard 208/230V single-phase electrical requirements mean no special wiring upgrades for most residential installations. Line sizing is straightforward with 3/8-inch liquid, 7/8-inch suction, and matching valve sizes, reducing field errors during commissioning.

Pros & Cons

Pros

Competitive pricing with 42,000 BTU capacity suitable for 1,400-1,600 sq ft homes
10-year warranty with online registration covers manufacturing defects
Single-stage reciprocating compressor design is straightforward to service and repair
Standard 208/230V single-phase electrical compatibility simplifies residential installation
Horizontal 21-inch A-coil configuration fits tight attic and crawlspace applications

Cons

13 SEER rating lags behind modern 15-18 SEER units, resulting in higher operating costs
75 dB noise level is noticeably louder than variable-speed alternatives for homeowners sensitive to sound
Single-stage operation cycles on and off rather than modulating capacity, reducing comfort and efficiency
Not Energy Star certified, meaning no rebate eligibility in many states

Who Should Buy

Best For

This coil suits budget-limited homeowners replacing failed equipment and contractors managing price-sensitive jobs in moderate climate zones. It's ideal when the primary goal is getting cooling running affordably rather than maximizing energy savings.

Consider Alternatives If

Skip this unit if you want cutting-edge efficiency, operate in hot climates where continuous runtime raises energy bills, or qualify for rebates that require Energy Star certification.

3.5 Ton 13 SEER Goodman Air Conditioner with Horiz

Buy at HVACDirect →

Installation

Installation complexity is low to moderate. The 120-pound coil mounts horizontally in attic or crawlspace positions using standard brackets. Refrigerant line connections use sweat valve fittings, 3/8-inch insulation thickness on suction lines prevents sweating. Electrical setup requires 23.9 to 40-amp breaker sizing depending on local code. Pre-charged refrigerant lines simplify field work, though proper evacuation and charging procedures remain essential.

Warranty & Reliability

ACiQ provides 10-year coverage on manufacturing defects when you register online within 30 days of purchase. Coverage includes compressor and coil, but excludes wear items and improper installation. Online registration is straightforward and required to activate the full term. This warranty is solid for the price point, though doesn't cover refrigerant loss or electrical components separately.

Specifications

SKU	ACIQ-4X-EHPD-UPG
Brand/Manufacturer	ACiQ
Cooling BTU	42,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	120.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Line	3/8"
Suction Line	7/8"
Liquid Valve Size	3/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.9 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Height	21"
Width	21.125"
Depth	26"
Resources	CHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
Configuration	Horizontal
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 13 SEER compare to newer equipment? +

13 SEER meets code but costs significantly more to operate than 15-18 SEER modern units. In a hot climate running 2,000 hours annually, the efficiency gap can mean 20-30 percent higher cooling costs. Choose 13 SEER only if budget constraints outweigh long-term operating expense concerns.

Will this coil fit my existing condenser unit? +

Compatibility depends on your existing condenser model and refrigerant type. This coil uses R410A, so condensers must be R410A-rated. Line sizes and electrical specifications must match your condenser. Have a qualified technician verify fitment before purchasing to avoid costly mismatch issues.

Is the 75 dB noise level a problem? +

75 dB is roughly equivalent to a vacuum cleaner operating nearby. Single-stage units cycle fully on and off, creating noticeable sound. If you value quiet operation, variable-speed or two-stage units run quieter. Placement in attics reduces indoor perception compared to outdoor mounting.

What makes this better value than competitor 3.5-ton coils? +

ACiQ pricing typically undercuts Goodman and Carrier direct equivalents by 15-25 percent while using similar components. The trade-off is no Energy Star badge, limiting rebate eligibility in some states. For non-rebate buyers, the price-to-performance ratio is competitive within the budget tier.

Does online registration really matter for warranty? +

Yes, registration within 30 days activates the full 10-year term. Without registration, coverage drops significantly. Keep your receipt and register immediately upon installation. ACiQ's online process takes five minutes and protects your warranty investment.

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